Ebyte E810-DTU User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd E810-DTU(1RS1E) User ManualCopyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd 143.4.8 Clear cacheWhen the TCP connection is not established, the data received by the serial port will be placed in the cache area. TheE810-TTL serial port receive cache is 2kbyte. After the TCP connection is established, the network cache data can be clearedaccording to the customer's requirements.The device has two buffer areas, which are the serial data buffer and the network data buffer. When the SOCKET clear cachefunction is enabled, only the cache data of the relevant SOCKET link will be cleared, and the serial cache data will not be cleared.3.4.9 Modbus TCP to RTU functionThe device supports Modbus RTU and Modbus TCP conversion function. After the function is enabled, the device receives thedata and detects whether the data meets the Modbus RTU (Modbus TCP) protocol requirements. After the verification is successful,the Modbus RTU data is converted to Modbus TCP, and the Modbus TCP data is converted to Modbus RTU data.3.4.10 Link/data transmission and reception indication functionLink indicates the network connection status of the module. In TCP mode, when the network is not connected, the Link is off,and when the connection is established, the Link is always on. The Link indicator is always on in UDP mode.The other is the data transmission indication, which shows the transmission status of the serial port data of the module. Whenthere is no data transmission on the serial port, the data transmission indicator is off. When there is data transmission on the serial port,the flashing indicates that the period is 60ms and the indicator is on for 10ms.